Biomass Based Small Scale Combined Heat and Power Tech

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Biomass Based Small Scale Combined Heat and Power Tech ( biomass-based-small-scale-combined-heat-and-power-tech )

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The values in Table 2.2, Table 2.3 and Table 2.4 were used to calculate the cost of electricity as a function of the number of annual operation hours. Figure 2.3 shows the results, (calculations are presented in Appendix B). 350 300 250 200 150 100 50 0 600kWel 1100kWel 1500kWel Electricity sell price inclus certificates 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 Annual full load operation hours [h] ive Figure 2.3 Electricity production costs as a function of annual operation hours The average price for one MWhel of electricity during the years 2006-2008 in Sweden was about 39.5 €/MWhel, [20]. If including revenues from green electricity certificates (see Chapter 1.1) which currently amounts to 26 €/MWhel the total electric income becomes 55.5 €/MWhel , this is illustrated by the dotted-line in Figure 2.3. To achieve economic viability the cost of electricity must be less than the total electric income, which is the case for the 1100 and 1500 kWel if the annual full load operation hours exceeds 8000. The 600 kWel is not profitable at present electricity prices and green electricity certificate values. Nevertheless, this is only valid for Sweden, which compared to other European countries has relative low electricity prices. Since the cost of electricity also depends on the biomass price a plot was made with the cost of biomass varying between 5 and 40 €/MWhfuel. The annual operation hours was assumed to be 6000, Figure 2.4 shows the results. 15 Generation cost [€/kWh]

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